Tuyere element for use in a stoker retort



Patented Aug. 21, 1951 TUYERE ELEMENT FOR USE IN A S'TOKER RETORT FrankL. Kyger, Streator, Ill.

Original application April 23, 1948, Serial No. 22,839. Divided and thisapplication May 20, 1949, Serial No. 94,364

2 Claims.

I This invention relates to a tuyere lement for use in a stoker retort,and has for one of its objects the production of a tuyre element whichis so constructed as to supply air currents to a fire-box for thepurpose of facilitating a maximum combustion.

A further object of this invention is the production of a simple andeflicient tuyere element, having air outlet or discharge ports which areshielded by baffie flanges so as to prevent fine coal and ashes fromworking up or climbing the vertical walls or baflie plates and enteringthe slots or air discharge ports against the pressure of the air whichis discharged from these ports.

other objects and advantages of the. present invention will appearthroughout the following specification and claims.

This application is a divisional application from my applicationrelating to a Stoker Retort, filed April 23, 1948, Serial Number 22,839.

In the drawing- Figure l isa front elevation view of the tuyre element,a portion of the support being shown in section;

Figure 2 is a central vertical sectional view taken on line 22 of Figure1;

Figure 3 is a horizontal sectional view taken on line 3-3 of Figure 1;

Figure 4 is a fragmentary side elevational View of the tuyere element;

Figure 5 is a fragmentary rear elevational view showing the upper end ofthe tuyere element;

Figure 6 is a fragmentary front elevational view of the detachablebaflie plate element;

Figure 7 is a top plan view of the detachable baffle plate element.

By referring to the drawing, it will be seen that In designates asupport such as a retort having an air entrance aperture l I throughwhich a blast of air is adapted to pass. The lower end of a tuyereelement I2 is preferably seated within a socket l3 which surrounds theaperture [2. A suitable anchor plate [4 which is carried by the retortI'll abuts the rear face of the tuyere element l2 and this element i2 ispreferably anchored thereto by means of a screw IS.

The tuyere element l2 comprises a substantially vertical hollow cylinderhaving a closed top [6 and an open bottom l1, which open bottom I1communicates with the aperture H, as shown in Figure 2. The rear face ofthe tuyre element I2 is reduced in its transverse diameter, as at [8,

to snugly conform to the transverse contour of the anchor plate I4. Thefront face IQ of the tuyere element [2 is provided with a plurality ofvertically spaced horizontal slots 20 which extend approximatelyone-half the diameter of the tuyre element I2 or around the front faceor half thereof, so that the slots 20 will face in the direction of thefire-box or fuel feeding trough when the tuyere element is mounted foroperation. The front half of the interior transverse diameter of thetuyre element I2 is enlarged relative to the rear portion l8, as shownin Figure 3, thereby defining a pair of vertical ledges 2| at thejunction of the rear portion [8 and the front half of the element l2. Acentral bracing web 22 is preferably located intermediate the ends ofeach slot 20 to reinforce the tuyere element centrally. The upper andlower walls of each slot 20 preferably diverge outwardly, as shown inthe drawing, and tend to prevent the clogging of the slots. An air blastpassing outwardly through the slots 20 will also tend to dislodge anyclogging ashes, fuel, or the like.

A removable bafiie member 23 is fitted into the tuyre element 12 throughthe open lower end thereof, and comprises a substantially semi-circularmember in transverse section having vertical side flanges 24 which abutthe vertical ledges 2| of the element [2, The bafiie member 23 isprovided with a, plurality of transversely extending vertically spacedslots 25 which are arranged in vertical staggered relation with respectto the slots 20, as shown in Figure 2. A baffle flange 26 is locatedbelow each slot 25, and a bafiie flange 1'26 is located at the top ofthe baflie member 24, as shown in Figure 2. The flanges 26 and 26 areinset or spaced inwardly relative to the slots 20, as shown in Figure 2.Thebaflle member 24 also is provided with forwardly protrudingsemi-circular horizontal flanges 2'! which abut the inner face of thetuyre member I2 in vertical spaced relation and contact the tuyeremember l2 just below the slots 26. The upper and lower faces of theflanges 2? also are inclined downwardly and outwardly and tend toprevent clogging of the air exhaust ports of the device. It should benoted that the top edge of the balfie range 26 terminates short of thetop or closed end l6 of the element f2 to allow air to pass thereoverand out through the slots 20 as Well as through the slots 25. Since thebaffle flanges 26 and 2t are inset or inwardly spaced relative to theslots 26, the air from the wind box of the retort which enters theaperture ll, will pass up through the tuyre element 12, over the upperend of the flange 26 through the slots 25, downwardly over the front ofthe flanges 26 and 26 and outwardly through the slots 20 in an irregularpath. The air blast will also tend to keep the various slots free fromclogging with fine coal or ashes. The bottom of the baflie member 24rests within the socket I3 in a manner similar to the member 12 and isheld in a proper position as shown in Figure 2.

It is a well known fact that a low grade coal such as bug dust will notburn with a natural draft nor in a regular or conventional stokerretort, because of lack of proper draft and the clogging of retort bycoke trees and the like, which form therein. With the use of a tuyrestructure as described and illustrated, this difficulty is avoided. Asfine coal and ashes work upwardly or across the face of the tuyereelement |-2, the structure of the slots and bafiie flanges and the airblasts which pass outwardly of the slots and over the bafile flangeswill tend to prevent the slots from becoming clogged or caked. This finematerial will not climb the vertical baffle-flanges '26 26 against thepressure of the 'air from the wind box passing through the tuyereelement. Although some of the fine material may enter the slots, thepressure of the air will prevent clogging and 'will'tend to blowthis'fine material outwardly from the slots thereby keeping the slotssubstantially open.

Having described the invention, what I claim a's'new is:

1. A'tuyere of the class described comprising a a hollow bodysubstantially circular in cross-section having a plurality of verticallyspaced transversely extending air outlet slots arranged one above theother, a removablebafiie element fitted within the body and havingbafiieflanges inset relative to said slots and in alignment with the 4 slots,and said baffie element having air outlet slots formed in the bafileflanges one above the other and arranged in vertical staggered relationwith respect to the slots in said body thereby defining an irregular airpassage leading through the tuyere and outwardly of said slots.

2. A tuyere of the class described comprising a hollow body having aplurality of vertically spaced air outlets arranged in superimposedrelation, a removable bafile element fitted in said hollow body andhaving a plurality of vertically spaced air "outlets arranged insuperimposed relation, the air outlets of the baffle element being invertical staggered relation to the air outlets of the hollow body, andthe bafile element being removable from the hollow body to facilitatselective replacement of the 'bafile element and the hollow body.

FRANK L. KYGER.

' REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Great Britain Nov. 3, 1932

